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[Impeller] Performing 2 identical fullscreen solid fill's in a row is expensive. #129292

@gaaclarke

Description

@gaaclarke

Solid Fill seems to be our most expensive draw call when drawing the gallery (~7x more expensive). When drawing the Gallery we are sometimes doing it twice in a row.

capture

Screenshot 2023-06-21 at 9 52 02 AM

reproduction steps

  1. launch gallery
  2. go to material -> cards
  3. capture a frame from scrolling the page
  4. notice the double solid fill in the fullscreen render pass, they are identical

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    P2Important issues not at the top of the work liste: impellerImpeller rendering backend issues and features requestsengineflutter/engine related. See also e: labels.

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